docs: def find_matlab_root():
      """Look for matlab binary and return root directory of MATLAB
      installation.
  
      """
      matlab_root = None
  
      path_dirs = os.environ.get("PATH").split(os.pathsep)
      for path_dir in path_dirs:
          candidate = realpath(join(path_dir, 'matlab'))
          if isfile(candidate) or isfile(candidate + '.exe'):
              matlab_root = dirname(dirname(candidate))
              break
  
      return matlab_root